<template>
	<view>
		<view class="goods-list">
			<block v-for="(goods,i) in goodsList" :key="i" @click="gotoDetail(goods)">
				<!-- 为 my-goods 组件动态绑定 goods 属性的值 -->
				<my-goods :goods="goods"></my-goods>
			</block>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//节流阀，判断是否正在请求
				isLoading: false,
				//定义请求参数对象
				queryObj: {
					//查询关键词
					query: '',
					//商品分类id
					cid: '',
					pagenum: 1,
					pagesize: 10
				},
				//商品列表数据
				goodsList: [],
				//总数量
				total: 0,
				//定义默认的空图片
				defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
			};
		},
		onLoad(options) {
			this.queryObj.query = options.query || ''
			console.log(this.queryObj.query)
			this.queryObj.cid = options.cid || ''
			this.getGoodsList()
		},
		methods: {
			async getGoodsList(cb) {
				this.isLoading = true
				 
				const {
					data: res
				} = await uni.$http.get('api/public/v1/goods/search', this.queryObj)
				this.isLoading = false
				// 只要数据请求完毕，就立即按需调用 cb 回调函数
				cb && cb()
				if (res.meta.status !== 200) return uni.$showMsg()
				// 为数据赋值：通过展开运算符的形式，进行新旧数据的拼接
				this.goodsList = [...this.goodsList, ...res.message.goods]
				this.total = res.message.total
			},
			gotoDetail(goods) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
				})
			}
		},
		//触底事件
		onReachBottom() {
			//判断是否还有下一页数据
			if (this.total <= this.queryObj.pagenum * this.queryObj.pagesize) return uni.$showMsg('数据加载完毕！')
			//判断是否正在请求数据
			if (this.isLoading) return
			//页码值自增
			this.queryObj.pagenum += 1;
			//重新获取列表数据
			this.getGoodsList()
		},
		//监听下拉刷新事件函数
		onPullDownRefresh() {
			//重置关键数据
			this.queryObj.pagenum = 1
			this.total = 0
			this.isloading = false
			this.goodsList = []
			//重新发起请求
			this.getGoodsList(() => uni.stopPullDownRefresh())
		}
	}
</script>

<style lang="scss">
	.goods-item {
		display: flex;
		padding: 10px 5px;
		border-bottom: 1px solid #f0f0f0;

		.goods-item-left {
			margin-right: 5px;

			.goods-pic {
				width: 100px;
				height: 100px;
				display: block;
			}
		}

		.goods-item-right {
			display: flex;
			flex-direction: column;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
			}

			.goods-price {
				font-size: 16px;
				color: #c00000;
			}
		}
	}
</style>